diff --git a/dlls/windowscodecs/proxy.c b/dlls/windowscodecs/proxy.c
index 91fb6e69d90..9d1c5dfe323 100644
--- a/dlls/windowscodecs/proxy.c
+++ b/dlls/windowscodecs/proxy.c
@@ -37,6 +37,12 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
 
+HRESULT WINAPI IPropertyBag2_Write_Proxy(IPropertyBag2 *iface,
+    ULONG cProperties, PROPBAG2 *ppropbag, VARIANT *pvarValue)
+{
+    return IPropertyBag2_Write(iface, cProperties, ppropbag, pvarValue);
+}
+
 HRESULT WINAPI IWICBitmapClipper_Initialize_Proxy_W(IWICBitmapClipper *iface,
     IWICBitmapSource *pISource, const WICRect *prc)
 {
diff --git a/dlls/windowscodecs/windowscodecs.spec b/dlls/windowscodecs/windowscodecs.spec
index 9497aec01be..81a827eaf97 100644
--- a/dlls/windowscodecs/windowscodecs.spec
+++ b/dlls/windowscodecs/windowscodecs.spec
@@ -4,7 +4,7 @@
 @ stdcall -private DllUnregisterServer()
 @ stub IEnumString_Next_WIC_Proxy
 @ stub IEnumString_Reset_WIC_Proxy
-@ stub IPropertyBag2_Write_Proxy
+@ stdcall IPropertyBag2_Write_Proxy(ptr long ptr ptr)
 @ stdcall IWICBitmapClipper_Initialize_Proxy(ptr ptr ptr) IWICBitmapClipper_Initialize_Proxy_W
 @ stdcall IWICBitmapCodecInfo_DoesSupportAnimation_Proxy(ptr ptr) IWICBitmapCodecInfo_DoesSupportAnimation_Proxy_W
 @ stdcall IWICBitmapCodecInfo_DoesSupportLossless_Proxy(ptr ptr) IWICBitmapCodecInfo_DoesSupportLossless_Proxy_W